One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,10)(8,9)(11,12)(13,14,18,22)(15,19,23,32)(16,26,28,36)(17,29,31,21)(20,30,35,27)(24,39,37,44)(25,41,38,34)(33,42,43,40)(6,9)(10,12)(13,15)(14,19)(16,24)(17,25)(18,23)(20,33)(21,34)(22,32)(26,39)(27,40)(28,37)(29,41)(30,42)(31,38)(35,43)(36,44) involution — undirected(1,2,3,4)(15,23)(19,32)(24,37)(25,38)(33,43)(34,41)(39,44)(40,42)(13,16,18,28)(14,20,22,35)(15,24,23,37)(17,30,31,27)(19,33,32,43)(21,36,29,26)(25,42,38,40)(34,44,41,39)(5,7,8,11)(6,10,9,12)(15,23)(19,32)(24,37)(25,38)(33,43)(34,41)(39,44)(40,42)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.